Buttonhole sewing and cutting machine.



Patented May 1,1900. J. T. HOGAN.

BUTTUNIIOLE SEWING AND CUTTING MACHINE.

(Al'aplication led Aug. 5, 1895. Renewed May 24, 1898.)

4 Sheets-Sheet l.

(No Model.)

www

MI -,I

v. kJ/WW Patented May l, |900.

No. 648,6l9. J. T, HOGAN.

BUTTONHOL SEWING AND CUTTING MACHINE.

(Application led Aug. 5, 1895. Renewed May 24, 1898.)

4 Sheets-Sheet 2 (No- Model.)

Patehfed may .1,v |900'.

um Il 4 sheets-sheet 3.

J. T. HOGAN. BUTTDNHOLESEWI'NG AND CUTTING-MACHINE.

ummm-l (mi Modal.)

No. 648,6I9. Patented May I, |900. J. T. HOGAN. BUTTO'NH-OLE SEWING AND CUTTING MACHINE.

Application filed Aug. 5 1895.' Renewed May 24, 189B.)

4 Sheets-Sheet 4.

(No Model.)

s fW/nr f/W l mi? p4: Nomus PzrEns no, wofmlmo., wsnmamu. o. c.

UNITED STATES PATENT OFFICE.

JAMES T'. HOGAN, OF JERSEY CITY, NEW .IERSEYASSIGNOR To TIIE NATIONAL MACHINE COMPANY, OE TROY, NEW YORK.

BUTTONHOLE SEWING AND CUTTING MACHINE.

SPECIFICATION forrrlrIg-g` part of Letters Patent No. 648,619, dated May 1, 1900.

l Application led August 5, 1895. Renewed May 24, 1898. Serial No. 681,588. (No model.)

T0 all whom, it may con/cern.-

Be it known that I, JAMES T. HOGAN, of Jersey City, in the county of Hudson and State lof New Jersey, have invented certain new and useful Improvements in Buttonhole Sewing and Cutting Machines, of which the following is a specification.

I will describe a machine embodying my improvement and then point out the novel features in the claims.

In the accompanying drawings, Figure l is a front elevation of a sewing-machine embodying my improvement. Fig. 2 is a partial plan and partial horizontal section of the same, taken generally at the plane of the dotted line 2 2, Fig. l. Fig. 3 is an elevation of one end of the machine. Fig. 4 is a transverse section taken mainly at the plane of the dotted line 4 4, Fig. l. Fig. 5 is a rear elevation of certain parts which are shown in front'elevation in Fig. l. Fig. 6 is a plan or top View Of the upper portion of the machine. Fig. 7 is a longitudinal section at the plane of the dotted line 7 7, Fig. 2. Fig. 8 isahorizontal section at the plane Of the dotted line S 8, Fig. 7.

Similar letters of reference designate corresponding parts in all the figures.

A designates a cloth-clamp forming a part of a Work-support for properly presenting the work to Athe sewing mechanism. In this machine there are two needles B B2 for stitching the two side rows of stitches simultaneously and also for forming barring-stitches at the ends of said rows of side stitches. As it is intended that both side rows of stitches shall be formed at once, it is only necessary to impart to the cloth a feeding motion in the direction of the length of a buttonhole in one way, or, in other words, without moving it in the reverse direction again. I prefer to have no feeding movement during the barring of the ends of a buttonhole, and so the feeding motion mentioned will generally occur only during the forming of the two rows of side stitches. The vibrating motion will occur,

as usual, during the feeding motion in order to form the two rows of side stitches and also during barring.

As in an earlier improvement made by me, the needles preferablywill turn, twist, or revolve one about the axis of the other during barring, and when this feature of operation is adopted the vibrating motion may be of the same amplitude and in the same position during barring as when the two rows of side stitches are being formed. As all these features are very fully described in application Serial No. 44.9,12l, filed by me October 17, 1892, for Letters Patent, it will be unnecessary for me to describe them here more fully.

In the present example of my improvement the work-clamp A is connected to a plate A', whosev Shank A2 is connected with a feedslide A3. The feed-slide A3 is connected by a rod A4 with a rotary feed-disk A5. Preferably the connection with the feed-disk will be adjustable, as usual.

The feedslide A3 is fitted to the slot of the vibrating plate C in the usual manner. The vibrating plate has a shank C', which is ftted in a slideway C2 on the base-plate D Of the attachment. To the shank C of the vibrating plate is pivot-ally connected by a pin or screw e the lower end of an upright lever E, which is fulcrumed between its ends on a pin or screw e', extending from a stationary bracket e2, rising from the base-plate/D of the attachment. This lever is operated by a cam inthe ordinary manner.

Having now explained generally the means whereby the feeding movement is produced and also the devices which produce the vibrating movement, I will describe means for suppressing the feeding movement during barring.

The rotary feed-disk A5 is made in the form 0f a gear-wheel and meshes with another gear-wheel F, which is here shown as half the diameter of A5. The said disk A5 is mounted upon a shaft or stud f, supported by a bracket f extending'from the base-plate D of the attachmen t. Any desired frictional device may be employed intermediate the gear-wheel and its shaft or stud fand bracket f. Fastened to the gearwheel F is a radial slotted or notched arm F', in which is tted a pin g, that extends upwardly from a ratchet-wheel Gr. This ratchet-wheel is eccentric with the gearwheel F, as is common in work-moving mechanism Of the kind under consideration. The ratchet-wheel is mounted upon a shaft or IOO ' stud that is supported in the base-plate D of the attachment.

G is a pawl that engages with the ratchetwheel G. It is pivoted by means of a screw or pin g to a swinging arm which is pivoted at one end to the shaft or stud of the baseplate D and at the other endis connected by a pin g2 with a slide-bar G2.

On the top of the ratchet-wheel is an intercepter-plate H, whose function it is to periodically prevent the pawl G from engaging with the ratchet G. It is loosely mounted upon the shaft or stud of the ratchet-wheel G, and has such frictional engagement with the ratchet-wheel as is sufficient to enable the latter to be carried along until some other device precludes its movement. It has three sets of ratchet-teeth 7L h2 7b3. The sets of ratchet-teeth h' h3 project beyond the ratchetteeth of the ratchet-wheel G, and the intermediate set h2 of ratchet-teeth is coincident with the teeth of the ratchet-wheel G. The pawl is wide enough to engage not only the teeth of the ratchet-Wheel G, but also the teeth of the intercepter plate H. Vhile barring is being done at the lowest end of the buttonhole, the ratchet-teeth 7L' will come opposite tothe pawl G', and the latter will then be moved out of engagement with the ratchetwheel and will coperate only with the intercepter-plate. After this barring shall have been done the set of ratchet-teeth h2 of the intercepter-plate will come opposite to the pawl, and then the pawl will move both the intercepter-plate and the ratchet-wheel together. At this time a stop-motion, with which the machine will preferably be provided, may be operated. Obviously the set of ratchet-teeth h3 of the intercepter-plate H will come in contact with the pawl during'the formation of the first set of barring-stitches of the next buttonhole, and will disengage the pawl from the ratchet-wheel. It need hardly be added that whenever the pawl is disengaged from the ratchet-wheel by means of the sets of ratchet-teeth 7i h3 of the intercepter-plate H there will be no feeding of the work. It should have been mentioned that the intercepter-plate has a circumferential slot h, into which projects the pin g, and thus is positively connected to the ratchetwheel at certain times when the ends of the slot coact with the pin.

The stop-motion above referred to consists of a friction-brake on the end of a lever fulcrumed on a bracket extending from the machine-head and adapted to engage a disk fixed to the main driving-shaft. As this forms no part of the present invention and isby which the said rod may be moved outwardly to throw the brake out of engagement .with the disk, thereby permitting the main driving-shaft to rotate.

N designates a lever fulcrumed on a stud D13 and is located, preferably, beneath the lever B12. The said lever N is Vnormally held by a spring VN2 so that one end is in the path of a slot N4, cut into the bed-plate. Through this slot projects a finger N3, forming part of a collar O3, fixed to the bar O, so that when the latter is moved forward to release the brake the spring N2 throws the lever N back of the finger N3, and thus prevents the rearward movement of bar O by its spring O2. To release the finger N3, I preferably secure to the feed-disk A5 two cams N', one of which at the completion of a buttonhole contacts with the inclined face N5 on lever N to throw the latter, thereby carrying the end of lever N out of engagement with the finger N3. The bar O will then be moved by its spring O2, held between collar O and a supportingbracket for the said bar, forming a part of the bed-plate, to bring the brake into cont-act with the disk on the driving-shaft.

N designates a handpiece attached to lever N, by which the latter may be moved at any time to release the finger N 3.

The slide-bar G2 will be operated in the usual manner by an arm G3, that is operated by a shaft arranged underneath the baseplate of the sewing-machine in a manner well known.

The needles B B2 are affixed to a single needle-carrier B, which is mounted in the head of the machine, so as to be free to reciprocate vertically and also to rotate. It may b e journaled in a sleeve B3, which is connected by a pin to one end of a rod B4, whose other end is pivotally connected to a crank-pin or screw extending from a disk that is affixed to a shaft arranged horizontally in the arm of the sewing-machine.

The needle-carrier B has affixed to it just above and below the sleeve B3 collars b b2, by means of which the reciprocating motion of the sleeve will be imparted to the needlecarrier and hence to the needles. The upper part of the needle-carrier is made in the form of a long pinion b, and it engages with a rackbar B5, iitted to Vslide in bearings b b5, provided in the upper portion of the sewingmachine head. The upright lever E is connected to this slide-bar by means of a rod B, which at one en'd is pivotally connected to the rack-bar and at the other end is provided with a hook for engaging a pin or screw 197, that is fastened to the lever' E. Whenever the rack-bar is reciprocated, it will rotatethel IOO IIC)

ITS

sor

BG has an inclined under face b9, so that when this rod, with the rack-bar, is reciprocated rearwardly it will rise upon the support B8 and so become unhooked from the upright lever E. It will be sustained in its unhooked position all the time, except during barring. Vhenever barring should occur, the adj ustable support Bs will be adjusted transversely to the rod B, so that the latter may descend and engage with the lever E and derive motion therefrom. A spring e', attached to the head of the machine and the rod B, provides a positive means to seat said rod on the pin o7.'

I will now describe a means for adjusting the support B8. The arm Z210 is pivotally connected to the support Bs and is fixed upon an upright rock-shaft B10, j ournaled at the lower end on the base-plate of the sewing-machine and near the other end in a bearing fastened on the side of the sewing-machine head. Near the lower end this rock-shaft B10 is provided with an arm Z212, that coacts with a lever B12, fulcrumed by a pin or screw Z113 to the baseplate D of the attachment. The other end of this lever coacts with a cam or projection I, moving with the feed-disk A5 and shown here as being arranged below it. When this cam or projection oscillates the said lever, it withdraws the adjustable support B8 from the rod B6. As the feed-diskA5 continues to rotate,the cam I is carried out of engagement with lever B12, and the spring B14, secured at one end to the head ofthe machine and at the other end to arm D10, moves the support B8 into a position to coact with the rod B6. As the feed-disk A5makes but one-half of a complete rotation for each longitudinal feed movement of the work-carrier, it is necessary to provide two cams I, as shown in Fig. S, to withdraw the support BS at the end of each half-rotation.

It will be observed that the needles B B2 are equidistant from theaxis of the cuttercarrier and diametrically opposite to each other. Owing to this, both may be revolved, so as to forni the stitches on opposite sides of the centerline of a buttonhole, as already described.

Vith the needles will be employed the usual concomitants,these ordinarily being two shuttles and means for operating them. As these features are fully set forth in my prior application aforesaid, I will not further describe them here.

J J 2 designate cutter-carriers, consisting of bars arranged vertically in the sewing-machine head on opposite sides of the needlebar, one forward and the other rearward of the needle-carrier. At the lower end they are provided with cutters K K2, each here shown as of a length suitable for cutting a buttonhole-slit at a single stroke. The lower portions of the cutter-carriers are fitted to slide in bearings j J2, with which the sewing-machine head is provided, their upper portions being fitted in sleevesj2j4, which turn in bearings j j in the upper portion of the sewingmachine head. Although the cutter-carriers are free to slide vertically in these sleeves y2 t7'1 and in their lower bearings j j2, yet they are engaged with said sleeves by means of splines, so that they will be oscillated whenever the sleeves are oscillated.

The cutter-carriers are provided with arms j7j8, which when the cutter-carriers are oscillated will engage with recesses Z916 Z117 in the sleeve B3. Whenever either of the cutter-carriers is thus engaged with the sleeve B3, the needle-carrier will cause the cutter of that carrier to make a buttonhole-slit. The top of each recess b1 Z917 is therefore a depressor.

While the cutter-carriers J J2 are in their normal inoperative positions, pins j10, with which they are provided, will bear upon shouldersj11, forming appurtenances of the sewingmachine head, and thus the cutter-carriers will be sustained during the time that they are not engaged with the sleeve B3.

The upper ends of the sleeves j2j4 are provided with crank-pins ji, which engage with fingers Z on slide-bars L. The slide-bars L and the ngers are arranged in opposite sides of the upper horizontal portion of the sewingmachine head andare supportedat the forward ends by means of pins or screws Z2, that are affixed to the sewing-machine head. At the rear ends these slide-bars L are provided with hooks Z4, that engage with pins or screws Z5, carried by the upright lever E.

With each slide-bar L is combined an adjustable support L for determining when such slide-bar shall engage with the lever E. The supports L at their forward sides and the hooks of the slide-bars L at their rear sides have inclined faces, so that the slidebars may ride upon said supports when reciprocated rearwardly after the supports have been adj usted into the proper position. The two supports L' are at their lower ends mounted upon rock-shafts or studs L2, affixed to the base-piece D of the attachment, and are connected together by a link L3. Preferably this IOO link will be made in two sections, adjustably connected by means of screws Z7, extending through slots Z, provided in one of the sections and engaging with tapped holes in the other section. These supports rock toward and away from the front of the machine, the rocking being produced by means of a lever L5, affixed to the rock-shaft of one and extending into a position to be actuated by two cams M M2, which are shown as being arranged upon the top of the rotary feed-disk. When one of the supports L' is rocked into position for disengaging its slide-bar L from the lever E, the other will loe in position to allow of the engagement of its slide-bar L with said lever E. One of the cams M M2 is for one cutter and the other for the second cutter. Obviously whenever either of the slide-bars shall be engaged with the lever E the corresponding cutter-carrier will be rotated into a position for cutting and engage with its depressor, or, in other words, the slide B2, to make a buttonhole-slit.

The rotary feed-disk makes only half a rotation for each buttonhole, and hence only one of the cams M M2 comes into play during the sewing and cutting of any buttonhole. As all parts of one buttonhole are sewed during one straightlongitudiual feed of the workolamp and another on the reverse straight longitudinal feed of the work-clamp, I em- .ploy two cutters, one of which operates at a proper relation to the termination of each straight longitudinal feed of the work-clam p, or, in other words, in proper relation to the sewing of each buttonhole.

With each of the supports L' is provided a supplementary adjustable arm L4, which is pivotally connected by a pin Z10 to the said support and normally held against the support by a spring Zn. Into each of the supports L, I preferably set a stop-screw Zw, so that instead of holding the supplementary arm L4 against the supports L they may be adjustedashortdistanceapart. This enables `me to use smaller cams on the feed-disk to effect the movements of lever E. rlhese supplementary arms and their appurtenances are Well known; but one of them has a new function in my improvement. In the present instance the supplementary arm of the rear support L has the function of sustaining the corresponding slide-bar L, while the rear cutter should remain inoperative. The supplementary arm of the rear support L is adj usted to a position opposite the corresponding slide-bar L, when the rear cutter should be disengaged from its depressor and turned into an inoperative position. The supplementary arm of this rear support is a little higher than the rear support, so that when the front slide-bar is allowed to drop between the support L' and the supplementary arm of the support by the forward roeking 'of the two supports L and their supplementary arms the rear slide-bar L will drop from the supplementary arm of the rear support L onto the rear support L.

I haveshown a spring P attached at one end to the bar L and at its other end to the support L to provide a positive means of bringing the bar L to its seat on vthe pin Z5 of the lever E. Each of the bars L will be provided with a spring P.

The drawings show the parts in position during the sewing of the second set of barring-stitches to complete a buttonhole when the lengthwise feed has been away from the operator. The lever L5 rests upon the face M', the front bar L rests upon its supportingarm L', and the rear barL rests upon its supplementary arm L4. After the barring the pawl G passes into engagement with the teeth h2 of the intercepter-plate H and the coincident teeth of ratchet-wheel G, and when the pawl is so positioned the stop-motion is operated. To begin the sewing of a buttonhole, the stop is released and both the intercepter-plate H and ratchet-wheel G are fed together for two or three teeth or until pawl G is thrown from engagement with ratchetwheel G and into engagement with the teeth h3 of intercepter-plate H. The first set of barring stitches is then formed during the suspension of the lengthwise feed of the worksupport. When pawl G passes out of engagement with teeth h3 at the end of the barring, said pawl engages the wheel G and rot-ates the same to produce a lengthwise feed of the work-support toward the operator. As the feed-disk A5 rotates the cam M2 is carried beneath the follower of lever L5 at or about the sewing of the last of the side stitches. As the lever L5 rides over the cam M2 the shaft L2 is rocked. This causes the front bar L to force the arm L4, against whose side it rests, it being higher than the support L', outward, thus permitting the bar Lto drop between the support L and arm L4 and to seat upon the pin Z5 of lever E. The lever E then moves the front bar L forward to bring the arm j? of cutter-bar J into engagement with recess b4 of the needle-bar, thus turning the cutter-blade into operative position. Continued rotation of the main driving-shaft carries the needle-bar and outter-bar J down together, and the cutter-blade of bar J cuts a buttonhole-slit between the two rows of side stitches while the feed-disk is at rest. gether, and the rearward movement of barL withdraws the arm j? from engagement with the recess b1?. As the bar L was moved forward out of contact with L and L4 the latter was thrown back by its spring Z1l until it struck the pin Z1?, thus bringing the inclined face of arm L4 into position to cause the bar L on its rearward movement to ride out of engagement with pin Z5 of lever E, so insuring but a single cut. When the front bar L was moved, as above described, to cut a slit, the rear bar L remained on its supporting-arm L4. After the formation of side stitches and the cutting of the buttonhole-slit,as described,the pawl G passes into engagement with the teeth Zt of plate H, and the barring mechanism is thrown into operation to form the barringstitches at the other end of the buttonholeslit. The lever L5, however, remains on the cam M,2 during the barring. Upon completion of the barring the pawl G' falls into engagement with the ratchet-wheel G and the intermediate set of teeth h2 of plate H. The rotation of the ratchet-wheel one or two teeth carries the cam M2 from beneath lever L5, so that the latter rests upon the top of the gearwheel, and as the shaft L2 is rocked by the movement of said lever the two bars L are moved, so that each rests upon its respective supporting-arm L with the outer face of the front bar L and the inner face of the rear bar L in contact with the side of their respective supplementary arms L4. Vhen in this position, the stop-motion comes into operation, and the work is removed or moved into position to start another buttonhole. a second buttonhole after the operations In starting The said bars are then raised to- IOO IIO

above described the stop-motion is released, the pawl G engages the teeth h3 of plate I-I, and the iirst set of barring-stitches are formed. The said pawl then engages ratchet-wheel G, and the work-carrier is fed in a direction the Vreverse of that during the sewing of the first buttonhole, or away from the operator, and the lever L5 rests upon the top of the gearwheel until near the end of the longitudinal feed movement, when said lever iscaused to ride over the cam M/ This movement of lever L5 rocks the shaft L2, so that the rear supporting-arm L is moved to one side from beneath the rear bar L, permitting the latter to fall between arm L' and its supplementary arm L" and into engagement with the rear pin Z5 of lever E. The forward movement of bar L by lever E carries arm js of cutter-bar .I2 into engagement with the recess Z717 of the needle-bar, and the cutter-blade is turned into operative position. The said cutter-bar is then caused to descend to cut a slit in the mannerbefore described with reference to the cutter-bar J'. As the bar J;2 is raised, and on the rearward movement of the rear bar L, the latter rides over the inclined face and is caused to rest upon the top of rear supplementary arm L4, out of engagement with the lever E. This completes the cycle of movements of the cutting mechanism, the parts being in the position as described at the beginning-that is, the front bar L rests upon the front supporting-armL and the rear bar L rests upon the rear supplementary arm L4. 4The buttonhole is then completed by barring the other end. When sewing thek third or next buttonhole, the cutter-bar J is brought into position to cut a slit, the fourth buttonhole, the bar J2, and so on. From this description it will be seen that the cutters are operated alternately, and this follows off-necessity by reason of the fact that one buttonhole is sewed during one longitudinal feed of the work-carrier and the next on the reverse feed. The movements just described are, first, barring; second, forming side stitches; third, cutting the buttonholeslit, and, fourth, barring to complete the buttonhole.

Vhile I have referred to abase-piece D, it is not necessary to make the feeding mechanism in the form of an attachment, aud'consequently to make a base-piece D separate from the base-piece of the sewing-machine.

What I claim as my invention, and desire to secure by Letters Patent, is

l. In a buttonhole sewing and cutting machine,the combination of suitable stitch-forming mechanism and a work-support, means for producing a relative movement between the needle and work-support for the sewing of a buttonhole, two cutters, and mechanism for operating these cutters alternately, whereby the respective cutters are caused to cut alternate buttonholes during successive operations of the machine, substantially as described.

CIK

2. In a buttonhole sewing and cutting machine, the combination with suitable stitchforming and work-supporting mechanism for sewing a buttonhole with a single longitudinal feed of said support, of two cutters and mechanism for operating these cutters alternately, whereby the respective cutters are caused to cut alternate buttonholes during successive operations of the machine, substantially as described.

In a buttonhole sewing and cutting machine, the combination of sewing mechanism comprising a plurality of needles, a worksupport mechanism for feeding the work suitably for the sewing of a buttonhole with a single longitudinal feed, two cutters and means for operating these cutters alternately, for successive buttonholes, substantially as described.

4. In a buttonhole sewing and cutting machine, the combination with sewing mechanism comprising a plurality ofneedles and a work-support, of means for imparting to said support a feed lengthwise of a buttonhole, means for producing a relative vibratory movement between the needle and work-support transversely to the length of a buttonhole, two cutters and means to operate said cutters alternately at the end of separate and distinct lengthwise feeding operations,where by the respective cutters are caused to cut alternate buttonholes during successive operations of the machine, substantially as described.

5. In a buttonhole sewing and cutting machine the combinatiop with sewing mechanism comprising a plurality of needles aflixed to a single bar, and a work-support, of means for producing a relative vibratory movement between the needle and work-support transversely to the length of a buttonhole, also a feed lengthwise of a buttonhole, two buttonhole-cutters and means actuated by said lengthwise-feeding means to bring said cutters alternately into engagement with the needle-bar at predetermined periods, substantially as described.

6. In a buttonhole sewing and cutting machine the combination of sewing mechanism comprising a needle-bar, means to reciprocate said bar, two buttonhole-cutters, and means for bringing said cutters alternately into engagement with the needle-bar at predetermined periods, substantially as described.

7. In a buttonhole sewing and cutting machine the combination of sewing mechanism comprising a needle-bar, means to reciprocate said bar, a work-support, meansl for imparting to said support a progressive feed movement lengthwise of a buttonhole, means for producing a relative vibratory movement between the needle and work-support transversely to the length of a buttonhole, two cutters, and mechanism actuated by said feeding means for bringing said cutters alternately into engagement with the needle-bar, p

substantially as described.

IOO

IIO

8. In a buttonhole sewing and cutting machine, the combination .of sewing mechanism, a work-support, means for imparting to said support a progressive feed movement lengthwise of a buttonhole, means for producing a relative vibratory movement between the needle and work-support transversely to the length of a bnttonhole, two bars each carrying a suitable buttonhole-cutter, mechanism intermediate said bars and the feed mechanism actuated by the latter to bring these cutters alternately into operative position for cutting a buttonhole and means to actuate said bars, substantially as described.

9. In a buttonhole sewing and cutting machine, the-combination with sewing mechanism and a work-support, of means to impart to said support a progressive feed movement lengthwise of a buttonhole, means for producing a relative vibratory movement between the needle and work -support transversely to the length of a buttonhole, two buttonholc-cuttcrs, two cams actuated by said feeding mechanism, a lever actuated by said cams, and mechanism intermediate said lever and cutters for operating the latter alternately, substantially as described.

10. In a buttonhole sewing and cutting machine, the combination of sewing mechanism comprising a reciprocating needle-bar,a worksupport, a feed-wheel for imparting to said support a progressive feed movement lengthwise of a buttonhole, means for producing a relative vibratory movement between the needle and work-support. transversely to the length of a buttonhole, two .buttonhole-cutters, two cams actuated by said feed-wheel, a lever actuated by said cams and mechanism intermediate said lever and cutters to bring the latter alternately into engagement with said needle-bar, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JAMES T. HOGAN.

Vitnesses:

WILLIAM A. PoLLoCK, ANTHONY GREF. 

